it appears to me that the latest Rhino7 update breaks the said function from the Rhino-Common API. I’ve got a couple of scripts making use of it and they don’t find intersections anymore since I updated to version 7.3.21039.11201, 8/02/2021. I used this function just before the update and it worked. The previous Rhino version was from 21/01/2021, if I remember correctly.
It would be great if you could check that. I’m using those scripts frequently in my daily workflow.
Kind regards, Gero.